Conductive Plastic Printing Blanket Layer
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Solution Overview
Problem
Current printing blankets for digital and offset printing require thick, soot-filled rubber cover layers for electrical conductivity, which are costly to produce and maintain, and result in dimensional fluctuations and high surface cleaning expenses.
Innovation Solution
Incorporating electrically non-conductive materials coated with metals as fillers in a thin, conductive plastic layer, allowing for higher layer thicknesses of other functional layers and eliminating the need for grinding and soot, while enabling electrical charging and heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a thick rubber cover layer filled with soot is used to achieve sufficient electrical conductivity, then the electrical conductivity requirement is met, but the manufacturing cost increases and surface cleaning expenses rise
Solution Approach 1:
The invention changes the material parameters of the cover layer by using a plastic material with inherently higher electrical conductivity than rubber. This allows achieving the required electrical conductivity with a much thinner layer (5-50 μm instead of >150 μm), eliminating the need for thick soot-filled rubber covers and subsequent grinding and cleaning operations
Solution Approach 2:
The invention uses a composite structure combining a plastic base material with metallic filler particles (such as aluminum or silver). This composite approach achieves high electrical conductivity in a thin layer without requiring the thick soot-filled rubber structure, thereby reducing manufacturing complexity and surface cleaning requirements
2Reliability
If relatively large amounts of soot are mixed into the cover layer to achieve high electrical conductivity, then the electrical conductivity is sufficient, but the layer thickness must be increased to more than 150 μm
Solution Approach 1:
The invention changes the electrical conductivity parameter by switching from soot-filled rubber to plastic with metallic fillers. This material substitution enables achieving the same or better electrical conductivity with a layer thickness of only 5-50 μm, dramatically reducing the required cover layer thickness
Solution Approach 2:
The thin plastic cover layer with metallic filler can be produced as a disposable or easily replaceable component. Its thinness and ease of production allow for cost-effective manufacturing without the need for thick, durable rubber structures, simplifying the overall blanket construction
3Ease of manufacture
If the cover layer thickness is reduced to eliminate grinding, then the manufacturing process is simplified, but sufficient electrical conductivity must still be achieved
Solution Approach 1:
The invention changes the base material parameter from rubber to plastic, which has inherently higher electrical conductivity. This allows thin layers (5-50 μm) to achieve sufficient electrical conductivity without requiring thick structures or post-production grinding to ensure uniform thickness and conductivity
Solution Approach 2:
The composite of plastic with metallic filler particles (aluminum, silver, or their alloys) provides high electrical conductivity in a thin layer. This composite structure achieves the required conductivity without grinding, as the metallic fillers create conductive pathways throughout the thin plastic matrix
4Ease of manufacture
If a thin, highly conductive plastic layer is used instead of thick soot-filled rubber, then the manufacturing process is simplified and costs are reduced, but the plastic material must provide sufficient electrical conductivity on its own
Solution Approach 1:
The invention uses a composite material consisting of a plastic base (such as polyolefin, polyester, or polyamide) combined with metallic filler particles (aluminum, silver, or their alloys). This composite provides the necessary electrical conductivity in a thin layer (5-50 μm) without requiring the thick rubber structure, achieving both manufacturing simplicity and sufficient conductivity
Solution Approach 2:
The invention changes the electrical conductivity parameter by selecting plastic materials and metallic fillers with appropriate properties. The combination achieves high electrical conductivity in a thin layer, eliminating the need for thick soot-filled rubber while maintaining or improving conductivity performance
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Simplifies the manufacturing process, reduces costs, and allows for the production of light-colored, conductive layers with improved overall product properties and surface quality.
Implementation Method 1
the electrically conductive plastic layer contains carrier materials made of electrically non-conductive material coated with metals as a filler
Implementation Method 2
The compressible intermediate layer enables the setting of a targeted compressibility, which enables a defined ink transfer to the material to be printed
Implementation Method 3
a compressible intermediate layer, which usually has gas inclusions
Data Source
Figure 1
AI summary
The invention relates to a multilayer elastic printing blanket (1) comprising at least one reinforcing layer (2), at least one compressible intermediate layer (4), and at least one electrically conductive plastic layer (5). The invention further relates to a method for manufacturing such a printing blanket (1). For simple and cost-effective production, the electrically conductive plastic layer (5) contains as filler metal powder, metallic microspheres, finely divided metal platelets, and/or metal-coated carrier materials made of electrically non-conductive material.